Podcast
Questions and Answers
A housing developer is planning a new community on a slope-adjacent land. Which combination of geological assessments and engineering solutions would be the MOST comprehensive for mitigating landslide risks?
A housing developer is planning a new community on a slope-adjacent land. Which combination of geological assessments and engineering solutions would be the MOST comprehensive for mitigating landslide risks?
- Comprehensive geotechnical investigation, slope stability analysis, deep foundation systems and advanced surface and subsurface drainage systems. (correct)
- Historical landslide data review, slope stabilization with retaining walls, and implementing a basic surface water drainage system.
- Superficial soil analysis, vegetation planting and shallow foundations.
- Visual inspection of the slope, avoiding construction on steep sections, and informing future residents about potential risks.
Which scenario presents the highest risk of a translational landslide?
Which scenario presents the highest risk of a translational landslide?
- A rapid movement of debris along a planar surface, following intense rainfall on a slope with a preexisting weak layer. (correct)
- A rotational slide near the summit of a mountain, with a well-defined scarp and visible accumulation at the toe.
- The gradual downslope movement of soil and rock fragments, characterized by tilted trees and bent fences.
- A slow-moving slide with a curved slip surface, occurring after a period of moderate rainfall.
What are the implications of land subsidence on coastal communities and infrastructure?
What are the implications of land subsidence on coastal communities and infrastructure?
- Beneficial, as it creates new land for development and enhances the aesthetic value of coastal areas.
- Minimal, as the process is gradual and predictable, allowing for timely adjustments in infrastructure.
- Significant, increasing the risk of flooding, saltwater intrusion, and damage to buildings and utilities, which can lead to displacement and economic losses. (correct)
- Neutral, as the effects are localized and do not impact the broader ecosystem or regional economy.
How does the presence of a soluble bedrock, such as limestone, influence the likelihood of ground collapse, and what specific measures can mitigate this risk??
How does the presence of a soluble bedrock, such as limestone, influence the likelihood of ground collapse, and what specific measures can mitigate this risk??
In a region prone to both slow land subsidence and sudden ground collapse, which integrated strategy would be the MOST effective for long-term hazard management and risk reduction?
In a region prone to both slow land subsidence and sudden ground collapse, which integrated strategy would be the MOST effective for long-term hazard management and risk reduction?
Which of the following scenarios best illustrates the potential cascading impacts of a geologic hazard on a community's infrastructure and economy?
Which of the following scenarios best illustrates the potential cascading impacts of a geologic hazard on a community's infrastructure and economy?
How would the removal of vegetation on a steep slope affect the likelihood and magnitude of mass movement events?
How would the removal of vegetation on a steep slope affect the likelihood and magnitude of mass movement events?
What distinguishes a rotational landslide from a translational landslide in terms of mechanism, slip surface, and potential impact?
What distinguishes a rotational landslide from a translational landslide in terms of mechanism, slip surface, and potential impact?
How can communities utilize remote sensing technologies and data analytics to proactively manage the risks associated with land subsidence and ground collapse??
How can communities utilize remote sensing technologies and data analytics to proactively manage the risks associated with land subsidence and ground collapse??
How do changes in land use and urbanization patterns influence the occurrence and severity of ground collapse in susceptible areas?
How do changes in land use and urbanization patterns influence the occurrence and severity of ground collapse in susceptible areas?
In an area prone to landslides, what factors MOST significantly contribute to the destabilization of slopes?
In an area prone to landslides, what factors MOST significantly contribute to the destabilization of slopes?
A coastal community is experiencing increasing incidents of property damage due to land subsidence. What combination of factors is MOST likely contributing to this issue?
A coastal community is experiencing increasing incidents of property damage due to land subsidence. What combination of factors is MOST likely contributing to this issue?
A geological survey reveals that a planned construction site is located above a soluble limestone formation. What specific risks should engineers anticipate, and what preventative measures should they implement?
A geological survey reveals that a planned construction site is located above a soluble limestone formation. What specific risks should engineers anticipate, and what preventative measures should they implement?
If you observe tilted poles, soil ripples, and fences out of alignment, what type of mass movement is MOST likely occurring?
If you observe tilted poles, soil ripples, and fences out of alignment, what type of mass movement is MOST likely occurring?
Which preventive measure is MOST effective in reducing the risk of ground collapse in areas with soluble bedrock?
Which preventive measure is MOST effective in reducing the risk of ground collapse in areas with soluble bedrock?
How does urbanization typically exacerbate the risk of ground collapse in susceptible areas?
How does urbanization typically exacerbate the risk of ground collapse in susceptible areas?
In landslide-prone regions, what role does comprehensive risk assessment play in community planning and resilience?
In landslide-prone regions, what role does comprehensive risk assessment play in community planning and resilience?
What is the MOST direct consequence of deforestation on the stability of slopes in mountainous regions?
What is the MOST direct consequence of deforestation on the stability of slopes in mountainous regions?
How does monitoring ground deformation contribute to reducing the impacts of land subsidence and ground collapse?
How does monitoring ground deformation contribute to reducing the impacts of land subsidence and ground collapse?
What combination of factors makes translational landslides particularly dangerous??
What combination of factors makes translational landslides particularly dangerous??
How could the disruption of natural drainage patterns due to construction activities affect slope stability in a hilly area??
How could the disruption of natural drainage patterns due to construction activities affect slope stability in a hilly area??
What immediate actions should a community take upon recognizing signs of an impending ground collapse?
What immediate actions should a community take upon recognizing signs of an impending ground collapse?
What is the relationship between groundwater extraction and land subsidence??
What is the relationship between groundwater extraction and land subsidence??
A community wants to build a new housing development but is located near landslide prone areas. What steps should a builder take to reduce the hazard from their operation??
A community wants to build a new housing development but is located near landslide prone areas. What steps should a builder take to reduce the hazard from their operation??
What steps should a scientist take to help study and report on Translational Landslides?
What steps should a scientist take to help study and report on Translational Landslides?
What is the key difference between Land Subsidence and Ground Collapse?
What is the key difference between Land Subsidence and Ground Collapse?
How do infrastructure projects that involve heavy construction and alteration of surface topography impact the potential for ground collapse in urban areas?
How do infrastructure projects that involve heavy construction and alteration of surface topography impact the potential for ground collapse in urban areas?
How can urbanization in densely populated areas intensify the effects of ground collapse??
How can urbanization in densely populated areas intensify the effects of ground collapse??
What type of environment is the biggest risk for eventual ground collapse?
What type of environment is the biggest risk for eventual ground collapse?
Flashcards
Geologic Hazards
Geologic Hazards
Any geologic activity that can cause property and environmental damage as well as loss of life.
Mass Movement
Mass Movement
A collective term for any land movement that occurs on a slope of a certain land formation.
Rotational Landslide
Rotational Landslide
A type of landslide movement that typically occurs on a mountain slope with a curved shape.
Translational Landslide
Translational Landslide
Signup and view all the flashcards
Land Subsidence
Land Subsidence
Signup and view all the flashcards
Ground Collapse
Ground Collapse
Signup and view all the flashcards
Study Notes
- Geologic hazards are geologic activities potentially causing property and environmental damage, as well as loss of life.
- Common geohazards include mass movement, ground collapse, and ground subsidence.
Learning Objectives
- Identify different geologic hazards.
- Analyze the causes of geologic hazards.
- Recognize the signs of an impending geologic hazard.
Essential Question
- How can geologic hazards be prevented in communities?
Mass Movement
- This is a collective term for any land movement on a slope.
- Hazardous events include: landslide, topple, rockslide, avalanche, mudslide, rock fall, creep, and block slide.
Two Kinds of Landslides
- Rotational landslides and translational landslides.
Rotational Landslides
- These occur on mountain slopes with curved-shape features.
- Rotational landslides are generally less dangerous than translational landslides.
Translational Landslides
- Downslope movement of material occurs along a distinctive planar surface of weakness such as a fault, joint, or bedding plane.
- Some of the largest and most damaging landslides are translational.
- Also termed as a Planar Landslide.
Land Subsidence and Ground Collapse
- Occurs when large amounts of groundwater have been withdrawn from certain types of rocks, such as fine-grained sediments.
- Rock compacts because the water is partly responsible for holding the ground up.
- When water is withdrawn, the rocks fall in on itself.
Land Subsidence
- This is a geologic activity with a gradual, slow, downward movement of ground that may engulf the surrounding environment.
Ground Collapse
- A geologic event where the ground suddenly collapses downward due to weakened ground strength.
- Often occurs in heavily dense communities with massive infrastructures that exert heavy load and pressure on the ground.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
